Mug grip pattern



FIG. 1 is a top front perspective view of a mug grip pattern showing my new design;

FIG. 2 is a front view thereof, all sides being the same; and,

FIG. 3 is a bottom plan view thereof.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a mug grip pattern, as shown and described. 